The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2005
Filed:
Jul. 05, 2001
André Bouille, Annecy, FR;
André Bouille, Annecy, FR;
Alcatel, Paris, FR;
Abstract
The invention concerns a contact roller bearing for a vacuum pump comprising a rotor roller bearing ring () a coaxial stator roller bearing ring () between which are provided rolling elements () housed in succession and urged to roll on respective raceways of the rotor () and stator () roller bearing rings. The rolling elements comprise an alternating succession of rolling elements () whereof the outer surface is made of steel and of rolling elements () whereof the outer surface is made of ceramic, thereby reducing the resistance to acceleration of the contact roller bearing, which limits the friction and wear of the inner annular surface () of the contact roller and the corresponding bearing of the rotor.